R O H M P r o d u c t s f o r

E l e c t r i c V e h i c l e s

High Voltage

IGBT/SJ MOSFET

SiC Power Device

Isolation

Technology

General-Purpose

Power Supply/Tr/Di/

Shunt Resistor/Motor Driver, etc.+ +

+Dedicated

EV Block

+12V

Low Voltage

Circuit

IsolationHigh Voltage

Battery/Drive

Circuit

• High reliability/ high breakdown resistance• Miniaturization• Low consumption/ superior thermal resistance

=

ROHM's Approach to Dedicated EV Blocks

For specialized EV blocks, it is necessary to isolate the 12V low-voltage circuit

from the high voltage battery/drive system while providing higher reliability,

greater miniaturization, and lower power consumption. ROHM meets these needs

with a variety of power devices, including SiC, IGBTs, and SJ MOSFETs.

We also offer products optimized for a variety of solutions, including shunt

resistors for current detection, diodes, transistors, power supplies, and control

ICs for power devices that contribute to lower power consumption, higher

efficiency and greater miniaturization.

Dedicated EVBlock Needs

ROHM's Solutionfor Dedicated

EV Blocks

SiC Power DevicesAdopted for Inverters in Formula E – the Premier Racing Series for Electric Cars

As an official technology partner of Formula

E team Venturi, which participates in FIA's

Formula E Championship series, ROHM

supplies SiC (Silicon Carbide) power devices

that contribute to increased efficiency in the

power electronics system of state-of-the-art,

all-electric race cars.

Integrated into the inverter that comprisesthe core of the drive system

Contributes to smaller lighter inverters

Reduced 2kg

2016

SiC-Equipped Inverter

(IGBT + SiC SBD)

Decreased 30%

Increased 1.7%

Contributes to higher efficiencyand smaller size

(Cooling System)

Exploring the possibilities of SiC through Formula E

2015

Conventional Inverter

(IGBT + FRD)

SiC Power Devices Accelerate Electric Vehicle Innovation

Season 3Season 2

Efficiency

Weight

Volume

In the diagram below, showing dedicated EV blocks, ROHM is focusing its efforts

on the main inverter, DC/DC converter, onboard charger, and electric compressor.

Currently, integrating SiC SBDs in the onboard charger has become mainstream.

Going forward, we believe that SiC MOSFETs will be increasingly adopted to

provide greater efficiency and withstand voltage that will translate to shorter

charge times and increased charge efficiency. We ensure a stable supply of high

quality products by leveraging our vertically integrated production system in

which all processes, from materials to package, are carried out in-house.

For battery-driven Formula E cars, power supply

control is the most important factor, and making the

most efficient use of electricity can often mean the

difference between victory and defeat. ROHM SiC

power devices were adopted in the main drive

inverters for Season 3, achieving a significant

reduction in energy loss.

In Season 3, hybrid IGBT+SiC SBD modules replaced

conventional IGBT modules used in Season 2, and

Season 4, which starts at the end of 2017, will see the

adoption of full SiC power modules comprised of SiC

MOSFETs and SiC SBDs that further reduce switching

loss by 74% while at the same time significantly

improve vehicle performance by dramatically reducing

the size and weight of the inverter.

Conventional

IGBT Module

End of 2017

Full SiCModule

October 2016

HybridModule

Full SiC

IGBT + SBD

Conventional

IGBT + FRD

Switching Loss (W)

Eon Eoff Err

40% less

74% less

Approach to Formula E

Si FRDSi FRD Si FRDSi FRD

Si IGBT TSi IGBT

SiC SBDSiC SBD SiC SBDSiC SBD

Si IGBTSi IGBT Si IGBTSi IGBT

SiCMOSFET

SiC SBDSiC SBD SiC SBDSiC SBD

SiCMOSFET

ROHMMMMMMMMM SSSSSSSSSSSSSSiCiCiCiCiCiCiCCiCCii TTTTTTTTTTTTeeechnnoloo ogy DeDeelililiiveveveveveveveeveveveeeversrrrrrr Impmmmmm roveddd PePePerfrfrfororormamamancncnceee

Season 3Season 3

Season 4Season 4

New

Next

*The above data are the results of evaluation conducted by ROHM and intended for

reference purposes only. ROHM does not guarantee any of the characteristics shown here.

ROHM's approachto dedicated

EV blocks

h

Transmission

HV. Battery HV DC

LV DC

Auxiliary

BMS CAN

EMS

U

VW Pump

12 V

48 V

CAN

Steering

Motor INVERTER

EMS: Energy Management Systems

BMS: Battery Management Systems Fast Charge Station (DC) AC Charge Station

DC / DC

CONVERTERONBOARD

CHARGER

ELECTRIC

COMPRESSOR

Wireless Charger

1

4

DC / DC

CONVERTER

DC / DC CONVERTERONBOARD CHARGERIn EVs the engine is replaced by a high voltage battery and motor.

The DC/DC converter switches power elements and utilizes a transformer

to convert the high battery voltage to a lower voltage.

To protect low voltage electronic circuits, it is necessary to electrically isolate

both the signal and ground from the low and high voltage boards.

ROHM DC/DC converters with built-in SiC MOSFET

enable high-speed switching, making it possible to

achieve greater miniaturization and higher performance

while improving safety.

Along with greater functionality and accuracy in

automotive blocks, ICs that can supply stable power to

MCUs and sensors are being increasingly demanded. In

response, ROHM offers linear regulators strong against

external noise and battery fluctuations. We also offer a

broad lineup of class-leading automotive-grade

quiescent current regulators that contributes to greater

energy savings and enables users to select the ideal

product based on application requirements.

Utilizing SiC power devices makes it

possible to reduce the size and power

consumption of EV systems. Superior

voltage and thermal resistance enable

mounting under harsh environments and

provide greater space savings through

optimized thermal design. This contributes

to higher efficiency in EVs while expanding

interior cabin space.

ROHM Init iat ives for Dedicated EV Blocks

ROHM Products for EV ECUs

LDOsSiC POWER DEVICES Single Output Low Saturation Regulators

SCT2 Series

SCS2 SeriesBD4xxMx Series

BD7xxLx Series

BD8xxMxx Series

Onboard chargers consist of AC/DC converters that convert an AC voltage

(100V to 240V) to a DC voltage in order to charge the high voltage battery.

To ensure worldwide compatibility, the permissible input voltage

for many onboard chargers ranges from 85V to 265V.

And to meet market needs for shorter charge times, the voltage specified

under fast charging standards is increased, along with battery voltage.

As a result, onboard chargers tend to have higher permissible input voltage,

promoting the use of SiC not only for the internal diodes, but MOSFETs as well.

AC

To an auxiliary battery,

car navigation system,

air conditioning,

ECU, etc.

High Vol t age monitor

Isolated Gate Driver

Isolated Gate Driver

Isolated Gate Driver

Driver

Memory Operational AmplifierComparator

Voltage Detector(Reset IC)

AC Line

Memory Operational AmplifierComparator

Voltage Detector(Reset IC)

Low OhmicResistor

SchottkyBarrier Diode

Fast RecoveryDiode Zener Diode Schottky

Barrier DiodeFast Recovery

Diode Zener Diode

Op. Amp.

I solator

Isolated Gate Driver

Isolated Gate

Driver

Isolated Gate

Driver

Isolated Gate

Driver

Isolated Gate

Driver

Isolated Gate

Driver

Isolated Gate

Driver

MCU

SiC SBD

SiC SBD

SiC SBD

SiC SBD

SiC MOSFET MOSFET

SiC MOSFETSiC MOSFET MOSFET

MOSFET

SiC MOSFETSiC MOSFET

SiC MOSFETSiC MOSFETSiC MOSFETSiC MOSFET

SiC MOSFETSiC MOSFETSiC MOSFETSiC MOSFET

SiC MOSFETSiC MOSFET SiC MOSFETSiC MOSFET

HV Battery

LVBattery14V output

LowOhmic

Resist or

LV PowerSupply

SBDMOSFET

LowOhmic

Resist or

CAN Transceiver

TVS Diode

LV Battery

Flyback Power Supply

Diode

MOSFET

Flyback Power Supply

Diode

MOSFET

MCULV Power

Supply

SBDMOSFET

LowOhmic

Resist orLow Voltage

Side

High Voltage Side

Low Voltage Side

High Voltage Side

Ou

tpu

t Vo

ltag

e (V

)

Frequency (MHz)

Noise Resistance(BD8xxMxx Series)

0 1000 2000 3000 4000

1

2

3

4

5

6

Stable output voltage

0

10

20

30

40

Circu

it C

urr

en

t (μ

A)

ConventionalSeries

Circuit Current

30

BD7xxLxxSeries0

20

40

60

80

100

120

Lo

ss (W

)

Si IGBT SiC MOSFET

Switching ON Loss

Switching OFF Loss

Conduction Loss

73% lower loss vs IGBT

6

cally isolate

MOSFETLV

Motor

High

Voltage

DC/DC CONVERTER

Batteries

Low Voltage ECU

Low Voltage Battery

SSiCC OSFETOMOSFET OSFETOOMOSFET

age

,

well.

SSiCC OS ETFETSMOSSMOOSFMOSOSFETFET OSFETMOSFOOSMOSFET

High VoltaSide

MAIN INVERTER ELECTRIC COMPRESSORThe main inverter converts DC voltage provided by the battery

into 3-phase AC voltage for driving the motor.

Many power devices used in inverters consist of IGBTs and diodes,

but the combination of SiC MOSFETs and SiC SBDs are drawing attention

due to their lower resistance and switching losses.

Going forward, we will work on further improving

performance, such as by reducing ON resistance.

In EVs, the AC compressor is electric.

High voltage is used to increase motor efficiency, and for inverters that

control rotation as well, high voltage, along with high reliability and high efficiency,

are important factors. ROHM IGBTs for electric compressors are

low-loss devices that achieve superior short-circuit tolerance.

ROHM IGBTs contribute to greater energy

savings and efficiency in a wide range of

high voltage high current applications.

Original trench gate structure and thin wafer

technology are used to achieve low

switching loss and VCE(sat). This makes the

AEC-Q101 qualified RGS series ideal for a

variety of EV systems, including the electric

compressor.

Features such as high power handling

capability and ultra-low resistance are

ideal for current detection in high power

automotive blocks. High precision welding

technology utilized between the resistive

element and electrodes allows ROHM's

PSR series to deliver excellent tempera-

ture coefficient of resistance (TCR) - even

in the low-ohmic region.

ROHM Init iat ives for Dedicated EV Blocks

ROHM Products for EV ECUs

SHUNT RESISTORS IGBTs Isolated Gate Bipolar Transistor

The broad lineup consists of both

low VF and IR types that allow

users to select the ideal product

based on set requirements.

ROHM offers a wide range of MOSFETs

that support a variety of motor and drive

applications, including low ON

resistance models developed utilizing

the latest processes.

RGS Series

SCHOTTKY BARRIER DIODES

MOSFETsHigh power achieved by combining

precision welding echnology

with a high-performance alloy

High Performance Resistive Alloy

(Ni-Cr/Cu-Mn)

PSR Series

Low VF Series

Ultra-Low IR Series

40V Series

60V Series

100V Series

Precision weldsElectrode (Cu) Electrode (Cu)

LV Battery

Memory Operational AmplifierComparator

Voltage Detector(Reset IC)

LV PowerSupply

I solator

Motor

Resolver

UVW

Isolated Gate

Driver

CurrentBuffer

Temperature Monitor IC

MOSFET Fast RecoveryDiode Zener Diode

Op. Amp. Current SenceI solator

MCU

Isolated Gate

Driver

CurrentBuffer

Isolated Gate

Driver

CurrentBuffer

Isolated Gate

Driver

CurrentBuffer

Isolated Gate

Driver

CurrentBuffer

Isolated Gate

Driver

CurrentBufferSBDMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

SiCMOSFET

LV Battery

HV Battery

LowOhmic

Resist or

CAN Transceiver

TVS Diode

Flyback Power Supply

Diode

MOSFET

CXPI Transceiver

Operational AmplifierComparator

Schottky Barrirer Diode

Motor

UVW

Isolated Gate

Driver

Isolated Gate

Driver

Isolated Gate

Driver

Isolated Gate

Driver

Isolated Gate

Driver

CAN Transceiver

Flyback

Power Supply Diode

Sensor

IGBT

MOSFET

LowOhmic

Resist or

IGBT

IGBT IGBT

IGBT

IGBT

LDO

Comparator

Isolated Gate

Driver

MCU

TVS Diode

I solator

I solator

HV Battery

LV PowerSupply

SBDMOSFETLow

OhmicResist or

Low Voltage Side

High Voltage Side

Low Voltage Side

High Voltage Side

Motor

Low Voltage ECU

DC/DC Converter

Low Voltage Battery

High

Voltage

Batteries

MAIN INVERTER

ROHM Automotive Catalogs

Includes detailed information on

the ROHM Group's broad range of

automotive products.

We offer an extensive lineup of

automotive-grade products and

solutions that support the

continuing electronification and

evolution of today's and

next-generation vehicles.

Automotive Catalog

Introduces ROHM's

industry-leading products for

power applications.

Also included are high voltage, high

efficiency devices utilizing SiC.

Please refer to our next-generation

Eco Devices that contribute to

greater energy savings and

reduced CO2 emissions.

Power Device Catalog

Automotive and Power Device Catalogs are available in addition to this brochure.

No.60P7124E-B 11.2017 PDF

October 1st, 2017.